Tent office



A. HOPPINS.

GUTTER HEAD.

(No Model.)

No. 331,970. Patented Deo. 8, 1885.

N, PETZRS. PmmLimogmpwr. was

I attach importance to the tapering form of my cylinders and the arms thereof which carry the planing-knives and grooving-cutters, for the tapering form adapts the cutter-head for use on inversely-inclined shafts for the purpose of forming dovetailed grooves while the board is being plaued. A cutter not having this tapering feature could not be used on inversely-inclined shafts to produce this result. Another advantage of the tapering form of cylinder is that the cut of the plane is diagonally across the face of the board instead of directly across thc grain, as is the case when cutter-heads of the ordinary form of construction are used. The end of the cylinder having the greater diameter will out in advance of the smalli r end, thus insuring smoother and better Work.

It Will be seen that the planing-knives act upon the principle of the ordinary rabbetplane.

Having thus described my invention and set forth its merits, what I claim as new, and desire to secure by Letters Patent, is-

l. A cutter-head of gradual taper from end to end, and carrying one or more planingknives and one or more grooving-cutters se- 8. The cutter-head described, composed of 4o aeylinder having radial arms, as ef d g. gradually decreasing in length from one end of the cylinder to the other, and said arms provided l. with planing-knives and grooving-cutters, said knives being removable and adjustable both 45 laterally and longitudinally, substantially as and for the purposes specied.

In testimony whereof I affix my signature in presence of two Witnesses.

ABIRAM HOPPINS.

Witnesses:

R. CRAWFORD, A. CHADWIOK. 

